[PATCH 18/23] conf: Avoid formatting empty <capabilities> element

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If none of the 'capabilities' features are enabled we'd still format the
opening and closing tag for the <capabilities element.

The implementation is suboptimal but will be refactored for a better
approach. This is done prior to the refactor to show that tests are not
impacted.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/conf/domain_conf.c                               | 9 ++++++++-
 tests/lxcconf2xmldata/lxcconf2xml-blkiotune.xml      | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-cpusettune.xml     | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-cputune.xml        | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-idmap.xml          | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-macvlannetwork.xml | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-memtune.xml        | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-miscnetwork.xml    | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-nonenetwork.xml    | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-nonetwork.xml      | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-physnetwork.xml    | 3 +--
 tests/lxcconf2xmldata/lxcconf2xml-vlannetwork.xml    | 3 +--
 12 files changed, 19 insertions(+), 23 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b42c63fb4d..90aa02a7ea 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -27933,8 +27933,15 @@ virDomainDefFormatFeatures(virBufferPtr buf,
                 break;
             }

-            virBufferAsprintf(buf, "<capabilities policy='%s'>\n",
+            virBufferAsprintf(buf, "<capabilities policy='%s'",
                               virDomainCapabilitiesPolicyTypeToString(def->features[i]));
+
+            if (!virDomainDefHasCapabilitiesFeatures(def)) {
+                virBufferAddLit(buf, "/>\n");
+                break;
+            } else {
+                virBufferAddLit(buf, ">\n");
+            }
             virBufferAdjustIndent(buf, 2);
             for (j = 0; j < VIR_DOMAIN_CAPS_FEATURE_LAST; j++) {
                 if (def->caps_features[j] != VIR_TRISTATE_SWITCH_ABSENT)
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-blkiotune.xml b/tests/lxcconf2xmldata/lxcconf2xml-blkiotune.xml
index 641edb94fa..ab07fb0e80 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-blkiotune.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-blkiotune.xml
@@ -25,8 +25,7 @@
   </os>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-cpusettune.xml b/tests/lxcconf2xmldata/lxcconf2xml-cpusettune.xml
index bafaa960f8..6df089d00f 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-cpusettune.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-cpusettune.xml
@@ -13,8 +13,7 @@
   </os>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-cputune.xml b/tests/lxcconf2xmldata/lxcconf2xml-cputune.xml
index f7f8041dd6..359c820a2d 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-cputune.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-cputune.xml
@@ -15,8 +15,7 @@
   </os>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-idmap.xml b/tests/lxcconf2xmldata/lxcconf2xml-idmap.xml
index dd3843d5cb..1efcc131cb 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-idmap.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-idmap.xml
@@ -14,8 +14,7 @@
   </idmap>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-macvlannetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-macvlannetwork.xml
index a345e8e019..cced2f25db 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-macvlannetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-macvlannetwork.xml
@@ -9,8 +9,7 @@
     <init>/sbin/init</init>
   </os>
   <features>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-memtune.xml b/tests/lxcconf2xmldata/lxcconf2xml-memtune.xml
index 57e751aaba..24af021e49 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-memtune.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-memtune.xml
@@ -15,8 +15,7 @@
   </os>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-miscnetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-miscnetwork.xml
index 63189cfaec..9e41e408ee 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-miscnetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-miscnetwork.xml
@@ -9,8 +9,7 @@
     <init>/sbin/init</init>
   </os>
   <features>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-nonenetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-nonenetwork.xml
index 0122ab05c7..1a8e51bb56 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-nonenetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-nonenetwork.xml
@@ -9,8 +9,7 @@
     <init>/sbin/init</init>
   </os>
   <features>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-nonetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-nonetwork.xml
index 04ea280b3c..3c9f4474e5 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-nonetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-nonetwork.xml
@@ -10,8 +10,7 @@
   </os>
   <features>
     <privnet/>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-physnetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-physnetwork.xml
index 4fb3f954e0..fa3cf67fc3 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-physnetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-physnetwork.xml
@@ -9,8 +9,7 @@
     <init>/sbin/init</init>
   </os>
   <features>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
diff --git a/tests/lxcconf2xmldata/lxcconf2xml-vlannetwork.xml b/tests/lxcconf2xmldata/lxcconf2xml-vlannetwork.xml
index 47ed898b0f..08bea62f7f 100644
--- a/tests/lxcconf2xmldata/lxcconf2xml-vlannetwork.xml
+++ b/tests/lxcconf2xmldata/lxcconf2xml-vlannetwork.xml
@@ -9,8 +9,7 @@
     <init>/sbin/init</init>
   </os>
   <features>
-    <capabilities policy='allow'>
-    </capabilities>
+    <capabilities policy='allow'/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
-- 
2.20.1

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